I have dual boot Ubuntu 16.04 and Windows 10 pro. On Windows 10, the PC goes through the usual shutting down process then the monitor turns off, but the HDD and all the fans stay powered on. It's very similar on Ubuntu except the monitor stays on.
I've had the problem for about a year now. It originally soon, if not immediately after I installed Ubuntu through the single boot, format the hard-drive process (single boot). Windows 10 was installed after Ubuntu, but the problem persisted. I now have W10 installed first and Ubuntu second.
Motherboard is Gigabyte GA-H55M-S2V
There doesn't seem to be a relevant solution for me on the internet. Any suggestions would be greatly appreciated. Thanks